<style lang="less">
  @import "./customTree.less";
</style>
<template>
  <div class="search">
    <Card>
      <Row class="operation">
        <Button @click="add" type="primary" icon="md-add">添加子节点</Button>
        <Button @click="addRoot" icon="md-add">添加一级节点</Button>
        <Button @click="delAll" icon="md-trash">批量删除</Button>
        <Button @click="getParentList" icon="md-refresh">刷新</Button>
        <i-switch v-model="strict" size="large" style="margin-left:5px">
          <span slot="open">级联</span>
          <span slot="close">单选</span>
        </i-switch>
      </Row>
      <Row type="flex" justify="start" class="code-row-bg">
        <Col span="6">
          <Alert show-icon>
            当前选择编辑：
            <span class="select-title">{{editTitle}}</span>
            <a class="select-clear" v-if="form.id" @click="cancelEdit">取消选择</a>
          </Alert>
          <Input
                  v-model="searchKey"
                  suffix="ios-search"
                  @on-change="search"
                  placeholder="输入节点名搜索"
                  clearable
          />
          <div class="custom-tree-bar" :style="{maxHeight: maxHeight}">
            <Tree
                    ref="tree"
                    :data="data"
                    :render="renderContent"
                    :load-data="loadData"
                    show-checkbox
                    @on-check-change="changeSelect"
                    :check-strictly="!strict"
            ></Tree>
          </div>
          <Spin size="large" fix v-if="loading"></Spin>
        </Col>
        <Col span="9" style="margin-left:10px">
          <Form ref="form" :model="form" :label-width="85" :rules="formValidate">
            <FormItem label="上级节点" prop="parentTitle">
              <Poptip trigger="click" placement="right-start" title="选择上级节点" width="250">
                <Input v-model="form.parentTitle" readonly/>
                <div slot="content" style="position:relative;min-height:5vh">
                  <Tree :data="dataEdit" :load-data="loadData" @on-select-change="selectTreeEdit"></Tree>
                  <Spin size="large" fix v-if="loadingEdit"></Spin>
                </div>
              </Poptip>
            </FormItem>
            <FormItem label="节点名称" prop="title">
              <Input v-model="form.title"/>
            </FormItem>
            <FormItem label="排序值" prop="sortOrder">
              <InputNumber :max="1000" :min="0" v-model="form.sortOrder"></InputNumber>
              <span style="margin-left:5px">值越小越靠前，支持小数</span>
            </FormItem>
            <FormItem label="是否启用" prop="status">
              <i-switch size="large" v-model="form.status" :true-value="0" :false-value="-1">
                <span slot="open">启用</span>
                <span slot="close">禁用</span>
              </i-switch>
            </FormItem>
            <FormItem label="是否为父节点">
              <i-switch v-model="form.isParent">
                <span slot="open">是</span>
                <span slot="close">否</span>
              </i-switch>
            </FormItem>
            <Form-item>
              <Button
                      @click="submitEdit"
                      :loading="submitLoading"
                      type="primary"
                      icon="ios-create-outline"
                      style="margin-right:5px"
              >修改并保存</Button>
              <Button @click="handleReset">重置</Button>
            </Form-item>
          </Form>
        </Col>
      </Row>
    </Card>

    <Modal :title="modalTitle" v-model="modalVisible" :mask-closable="false" :width="500">
      <Form ref="formAdd" :model="formAdd" :label-width="85" :rules="formValidate">
        <div v-if="showParent">
          <FormItem label="上级节点：">{{form.title}}</FormItem>
        </div>
        <FormItem label="节点名称" prop="title">
          <Input v-model="formAdd.title"/>
        </FormItem>
        <FormItem label="排序值" prop="sortOrder">
          <InputNumber :max="1000" :min="0" v-model="formAdd.sortOrder"></InputNumber>
          <span style="margin-left:5px">值越小越靠前，支持小数</span>
        </FormItem>
        <FormItem label="是否启用" prop="status">
          <i-switch size="large" v-model="formAdd.status" :true-value="0" :false-value="-1">
            <span slot="open">启用</span>
            <span slot="close">禁用</span>
          </i-switch>
        </FormItem>
      </Form>
      <div slot="footer">
        <Button type="text" @click="cancelAdd">取消</Button>
        <Button type="primary" :loading="submitLoading" @click="submitAdd">提交</Button>
      </div>
    </Modal>
  </div>
</template>

<script>
    export default {
        name: "custom-tree",
        data() {
            return {
                loading: false, // 树加载状态
                maxHeight: "500px",
                strict: true,
                loadingEdit: false, // 编辑上级树加载状态
                modalVisible: false, // 添加显示
                selectList: [], // 多选数据
                selectCount: 0, // 多选计数
                showParent: false, // 显示上级标识
                modalTitle: "", // 添加标题
                editTitle: "", // 编辑节点名称
                searchKey: "", // 搜索树
                form: {
                    // 编辑对象初始化数据
                    id: "",
                    parentId: "",
                    parentTitle: "",
                    sortOrder: 0,
                    status: 0
                },
                formAdd: {
                    // 添加对象初始化数据
                    title: ""
                },
                formValidate: {
                    // 表单验证规则
                    title: [{ required: true, message: "名称不能为空", trigger: "blur" }]
                },
                submitLoading: false,
                data: [],
                dataEdit: []
            };
        },
        methods: {
            init() {
                // 初始化一级节点
                this.getParentList();
                // 初始化一级节点为编辑上级节点使用
                this.getParentListEdit();
            },
            renderContent(h, { root, node, data }) {
                // 自定义render函数 这里主要通过数据中type字段判断 演示使用 当然你可以自定义业务逻辑
                if (data.type == "1") {
                    return h(
                        "span",
                        {
                            style: {
                                display: "inline-block",
                                cursor: "pointer"
                            },
                            on: {
                                click: () => {
                                    this.selectTree(data);
                                }
                            }
                        },
                        [
                            h("span", [
                                h("Icon", {
                                    props: {
                                        type: data.icon,
                                        size: "16",
                                        color: data.color
                                    },
                                    style: {
                                        "margin-right": "8px",
                                        "margin-bottom": "3px"
                                    }
                                }),
                                h(
                                    "span",
                                    {
                                        class: {
                                            "ivu-tree-title": true,
                                            "ivu-tree-title-selected": data.id == this.form.id
                                        }
                                    },
                                    data.title
                                )
                            ])
                        ]
                    );
                } else if (data.type == "2") {
                    return h(
                        "span",
                        {
                            style: {
                                display: "inline-block",
                                cursor: "pointer"
                            },
                            on: {
                                click: () => {
                                    this.selectTree(data);
                                }
                            }
                        },
                        [
                            h("span", [
                                h("img", {
                                    attrs: {
                                        src: require("@/assets/vip.png"),
                                        alt: "..."
                                    },
                                    style: {
                                        cursor: "pointer",
                                        width: "17px",
                                        height: "17px",
                                        "margin-right": "5px"
                                    }
                                }),
                                h(
                                    "span",
                                    {
                                        class: {
                                            "ivu-tree-title": true,
                                            "ivu-tree-title-selected": data.id == this.form.id
                                        }
                                    },
                                    data.title
                                )
                            ])
                        ]
                    );
                } else if (data.type == "3") {
                    return h(
                        "span",
                        {
                            style: {
                                display: "inline-block",
                                cursor: "pointer"
                            },
                            on: {
                                click: () => {
                                    this.selectTree(data);
                                }
                            }
                        },
                        [
                            h("span", [
                                h(
                                    "Avatar",
                                    {
                                        props: {
                                            size: "small"
                                        },
                                        style: {
                                            background: data.color,
                                            "margin-right": "5px"
                                        }
                                    },
                                    data.word
                                ),
                                h(
                                    "span",
                                    {
                                        class: {
                                            "ivu-tree-title": true,
                                            "ivu-tree-title-selected": data.id == this.form.id
                                        }
                                    },
                                    data.title
                                )
                            ])
                        ]
                    );
                } else {
                    return h(
                        "span",
                        {
                            style: {
                                display: "inline-block",
                                cursor: "pointer"
                            },
                            on: {
                                click: () => {
                                    this.selectTree(data);
                                }
                            }
                        },
                        h(
                            "span",
                            {
                                class: {
                                    "ivu-tree-title": true,
                                    "ivu-tree-title-selected": data.id == this.form.id
                                }
                            },
                            data.title
                        )
                    );
                }
            },
            getParentList() {
                // this.loading = true;
                // this.getRequest("一级数据请求路径，如/tree/getByParentId/0").then(res => {
                //   this.loading = false;
                //   if (res.success) {
                //     res.result.forEach(function(e) {
                //       if (e.isParent) {
                //         e.loading = false;
                //         e.children = [];
                //       }
                //     });
                //     this.data = res.result;
                //   }
                // });
                // 模拟请求成功
                this.data = [
                    {
                        title: "自定义图标",
                        id: "1",
                        type: "1",
                        icon: "logo-apple",
                        color: "",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: 0,
                        loading: false,
                        children: [
                            {
                                title: "带颜色的自定义图标",
                                id: "2",
                                type: "1",
                                icon: "logo-android",
                                color: "#97c03d",
                                parentId: "1",
                                status: 0,
                                parentTitle: "自定义图标"
                            }
                        ]
                    },
                    {
                        title: "自定义图片",
                        id: "3",
                        type: "2",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: 0
                    },
                    {
                        title: "自定义iView组件",
                        id: "4",
                        type: "3",
                        word: "E",
                        color: "orange",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: -1,
                        loading: false,
                        children: [
                            {
                                title: "自定义iView组件",
                                id: "5",
                                type: "3",
                                word: "字",
                                color: "#c601c6",
                                parentId: "1",
                                status: 0,
                                parentTitle: "自定义iView组件"
                            }
                        ]
                    }
                ];
            },
            getParentListEdit() {
                // this.loadingEdit = true;
                // this.getRequest("/tree/getByParentId/0").then(res => {
                //   this.loadingEdit = false;
                //   if (res.success) {
                //     res.result.forEach(function(e) {
                //       if (e.isParent) {
                //         e.loading = false;
                //         e.children = [];
                //       }
                //     });
                //     // 头部加入一级
                //     let first = {
                //       id: "0",
                //       title: "一级节点"
                //     };
                //     res.result.unshift(first);
                //     this.dataEdit = res.result;
                //   }
                // });
                // 模拟请求成功
                this.dataEdit = [
                    {
                        title: "自定义图标",
                        id: "1",
                        type: "1",
                        icon: "logo-apple",
                        color: "",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: 0,
                        loading: false,
                        children: [
                            {
                                title: "带颜色的自定义图标",
                                id: "2",
                                type: "1",
                                icon: "logo-android",
                                color: "#97c03d",
                                parentId: "1",
                                status: 0,
                                parentTitle: "自定义图标"
                            }
                        ]
                    },
                    {
                        title: "自定义图片",
                        id: "4",
                        type: "2",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: 0
                    },
                    {
                        title: "自定义iView组件",
                        id: "5",
                        type: "3",
                        word: "E",
                        color: "orange",
                        parentId: "0",
                        parentTitle: "一级节点",
                        status: -1,
                        loading: false,
                        children: [
                            {
                                title: "自定义iView组件",
                                id: "6",
                                type: "3",
                                word: "字",
                                color: "#c601c6",
                                parentId: "1",
                                status: 0,
                                parentTitle: "自定义iView组件"
                            }
                        ]
                    }
                ];
            },
            loadData(item, callback) {
                // 异步加载树子节点数据
                // this.getRequest("请求路径，如/tree/getByParentId/" + item.id).then(res => {
                //   if (res.success) {
                //     res.result.forEach(function(e) {
                //       if (e.isParent) {
                //         e.loading = false;
                //         e.children = [];
                //       }
                //     });
                //     callback(res.result);
                //   }
                // });
            },
            search() {
                // 搜索树
                if (this.searchKey) {
                    // 模拟请求
                    // this.loading = true;
                    // this.getRequest("搜索请求路径", { title: this.searchKey }).then(res => {
                    //   this.loading = false;
                    //   if (res.success) {
                    //     this.data = res.result;
                    //   }
                    // });
                    // 模拟请求成功
                    this.data = [
                        {
                            title: "这里需要请求后台接口",
                            id: "1",
                            parentId: "0",
                            parentTitle: "一级节点",
                            status: 0
                        },
                        {
                            title: "所以这里是假数据",
                            id: "4",
                            parentId: "0",
                            parentTitle: "一级节点",
                            status: 0
                        },
                        {
                            title: "我是被禁用的节点",
                            id: "5",
                            parentId: "0",
                            parentTitle: "一级节点",
                            status: -1
                        }
                    ];
                } else {
                    // 为空重新加载
                    this.getParentList();
                }
            },
            selectTree(v) {
                if (v && v.id != this.form.id) {
                    // 转换null为""
                    for (let attr in v) {
                        if (v[attr] == null) {
                            v[attr] = "";
                        }
                    }
                    let str = JSON.stringify(v);
                    let data = JSON.parse(str);
                    this.form = data;
                    this.editTitle = data.title;
                }else {
                this.cancelEdit();
    }
            },
            cancelEdit() {
                let data = this.$refs.tree.getSelectedNodes()[0];
                if (data) {
                    data.selected = false;
                }
                this.$refs.form.resetFields();
                this.form.id = "";
                delete this.form.id;
                this.editTitle = "";
            },
            selectTreeEdit(v) {
                if (v.length > 0) {
                    // 转换null为""
                    for (let attr in v[0]) {
                        if (v[0][attr] == null) {
                            v[0][attr] = "";
                        }
                    }
                    let str = JSON.stringify(v[0]);
                    let data = JSON.parse(str);
                    this.form.parentId = data.id;
                    this.form.parentTitle = data.title;
                }
            },
            cancelAdd() {
                this.modalVisible = false;
            },
            handleReset() {
                this.$refs.form.resetFields();
                this.form.status = 0;
            },
            submitEdit() {
                this.$refs.form.validate(valid => {
                    if (valid) {
                        if (!this.form.id) {
                            this.$Message.warning("请先点击选择要修改的节点");
                            return;
                        }
                        this.submitLoading = true;
                        // 避免传入null字符串
                        // this.postRequest("请求路径，如/tree/edit", this.form).then(res => {
                        //   this.submitLoading = false;
                        //   if (res.success) {
                        //     this.$Message.success("编辑成功");
                        //     this.init();
                        //     this.modalVisible = false;
                        //   }
                        // });
                        // 模拟成功
                        this.submitLoading = false;
                        this.$Message.success("编辑成功");
                        this.modalVisible = false;
                    }
                });
            },
            submitAdd() {
                this.$refs.formAdd.validate(valid => {
                    if (valid) {
                        this.submitLoading = true;
                        // this.postRequest("请求路径，如/tree/add", this.formAdd).then(res => {
                        //   this.submitLoading = false;
                        //   if (res.success) {
                        //     this.$Message.success("添加成功");
                        //     this.init();
                        //     this.modalVisible = false;
                        //   }
                        // });
                        // 模拟成功
                        this.submitLoading = false;
                        this.$Message.success("添加成功");
                        this.modalVisible = false;
                    }
                });
            },
            add() {
                if (this.form.id == "" || this.form.id == null) {
                    this.$Message.warning("请先点击选择一个节点");
                    return;
                }
                this.modalTitle = "添加子节点";
                this.showParent = true;
                this.formAdd = {
                    parentId: this.form.id,
                    sortOrder: 0,
                    status: 0
                };
                this.modalVisible = true;
            },
            addRoot() {
                this.modalTitle = "添加一级节点";
                this.showParent = false;
                this.formAdd = {
                    parentId: 0,
                    sortOrder: 0,
                    status: 0
                };
                this.modalVisible = true;
            },
            changeSelect(v) {
                this.selectCount = v.length;
                this.selectList = v;
            },
            delAll() {
                if (this.selectCount <= 0) {
                    this.$Message.warning("您还未勾选要删除的数据");
                    return;
                }
                this.$Modal.confirm({
                    title: "确认删除",
                    content: "您确认要删除所选的 " + this.selectCount + " 条数据及其下级所有数据?",
                    onOk: () => {
                        let ids = "";
                        this.selectList.forEach(function(e) {
                            ids += e.id + ",";
                        });
                        ids = ids.substring(0, ids.length - 1);
                        // this.deleteRequest("请求路径，如/tree/delByIds/" + ids).then(res => {
                        //   if (res.success) {
                        //     this.$Message.success("删除成功");
                        //     this.selectList = [];
                        //     this.selectCount = 0;
                        //     this.cancelEdit();
                        //     this.init();
                        //   }
                        // });
                        // 模拟成功
                        this.$Message.success("删除成功");
                        this.selectList = [];
                        this.selectCount = 0;
                        this.cancelEdit();
                    }
                });
            }
        },
        mounted() {
            // 计算高度
            let height = document.documentElement.clientHeight;
            this.maxHeight = Number(height - 287) + "px";
            this.init();
        }
    };
</script>
